Skip welcome & menu and move to editor
Welcome to JS Bin
Load cached copy from
 
<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>distinctUntilChanged Exploration</title>
  <script src="https://npmcdn.com/@reactivex/rxjs@5.0.0-beta.2/dist/global/Rx.umd.js"></script>
</head>
<body>
</body>
</html>
 
//only output distinct values, based on the last emitted value
const myArrayWithDuplicatesInARow = Rx.Observable
  .from([1,1,2,2,3,1,2,3]);
  
const distinctSub = myArrayWithDuplicatesInARow
    .distinctUntilChanged()
  //output: 1,2,3,1,2,3
    .subscribe(val => console.log('DISTINCT SUB:', val));
  
const nonDistinctSub = myArrayWithDuplicatesInARow
    //output: 1,1,2,2,3,1,2,3
    .subscribe(val => console.log('NON DISTINCT SUB:', val));
const sampleObject = {name: 'Test'};
const myArrayWithDuplicateObjects = Rx.Observable.from([sampleObject, sampleObject, sampleObject]);
//only out distinct objects, based on last emitted value
const nonDistinctObjects = myArrayWithDuplicateObjects
  .distinctUntilChanged()
  //output: 'DISTINCT OBJECTS: {name: 'Test'}
  .subscribe(val => console.log('DISTINCT OBJECTS:', val));
Output

You can jump to the latest bin by adding /latest to your URL

Dismiss x
public
Bin info
anonymouspro
0viewers